Improvement in brick-machines



ered.

that effin.'

GYRUS CHAMBERS, JR., OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 109,803, dated December 6, 1870.

lMPROVEMENT IN BRICK-MACHINES.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom c't may concern:

Be it known that I, CYRUs CHAMBERS, Jr., of the,

city of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in 'Brick-lidachines; and I do hereby dsclare the following to he afull and correct description of the same, 'reference being had to the accompanying drawings, in whichf Figure lis a side elevation of the knife-arm and knife;

' Figure 2 is a top view of the same;

Figure 3 is an enlarged side View of the cam; Figure 4 is a side and edge view ot' the loose jaw of the knife-clamp; and

Figure 5 is an enlarged "view of the forked end of the knife-arm, showing the lateral adjustment of the cam.

The same letter marks the same part wherever it y occurs.

This invention relates to that class of -brick-maehines iu which a continuous bar of clay is extruded from a puggng-chamber through a die, and out into proper lengths by a knife attached to the periphery of a wheel revolving at right angles to the clay-bar. Such a machine was invented-by mc, and patented October 6, 1863.

The knife in that machine, owing to the want of perfect adjustments and a correct 'method of hanging, was frequently broken, and this proved a serious clement of delay and expense, which I found it very dcsirable to eliminate.

To improve the machine in this regard is the'object of the present invention.

The invention consists in improvements in the cntoff arm, knife-clamp, cam, and spring, having for their object to diminish the breakage of knives in machines of the class to which the improvements'appertain, by rendering the adjustments of th'evknife more perfect, and its movements, when encountering the clay-bar or meeting a stone, better adapted to relieve it from danger of fracture, all as hereinafter more particularly set forth.

Toe-enable others to make and use myimprovef ments I will proceed to describe their construction and operation, referring, by the letters marked there- 011, to the drawings making part of this specification. r.'

.A marks the cnt-off arm, which" revolves in a plane at right angles to the bar of clay to be sev- In the cud of this arm is a fork, formed by two projecting jaws, J J, between which the knife-cam O- works. The shape of this earn is clearly represented in iigs. 3 and 5. It turns on a through-pin, P, and

is adj usted laterally by the two set-screws S S', bear-Y ing-'against the steel washers w w on the nave of the cam O. (See tig. 5.)

The cam C carries the knifedi, which is" made of thin sheet-steel. It is attached to the cam by a loosel clamp-jaw, L, held to the cam by a bolt and uut.

The bolt passes through the holes It hf'.

. The inner face of clamp-jaw L is lined with a strip of sheetfrnbber, r, and the knife is held in a recess in the cam C, between this rubber and the surface of said recess, by the jaw L, held dowiL upon it by the action of the screw-bolt and nut.

The bolt does not pass through the knife, which is retained in place by friction alone, the rubber insuring uniform contact and preventing the jarring ont of the blade.'

Clamped to arm A, by clamp-plates c c' and bolts b b and nuts n, is the spring-arm S, through a slot,s, in whose ixed end the pin d projects, as shown in figs. l and 2.

At the free end of this spring-arm is a fork formed hy the jawsjj, in which the roller -r turns. 'lhe jaws project beyond the periphery of the roller, and embrace thc edge ofthe cam C, keeping the roller always in its proper relative position to the cam.

When the knife K is in its usual position for severing the bar of clay, the roller Ir' is received in the recess It, .(tigs. 1 and 3,) in the face of cam C.

IVhen the knife is thrown' back, the roller'r is forced out of recess R, and traverses" on the lower curved edge E of the cam. b

Phe line 1/ y of the knife K does not correspond ili direction with thc'line a: of the arm A, but is inclined to it, as shown in fig. l.

.Y It' the line of the knife-edge were parallel to the line-.x a', the knife would strike the clay-bar first at one of itsfuppcr angles.

The line 'of the knife is inclined to that of the arm A, in order that tthe knife may come in contact with the claybar in a line corresponding with thel plane =of the upper surface of the bar, thus securing unitoo obvious to need detailed dethe plane of the upper surface scribed.

2. The knife-clamp L, constructed and adjusted as set forth, and operating to hold the knife in the manner specied. Y

3. The arrangement and combination of the com C, its recess R, and curved edge E, with the spring arm R', roller 1", and projecting jaws jj, in the manner and for the purpose stated.

4. The combination of the roller r',- jaws j j, and

of the bar, as de' cam C, for the purpose of keeping the roller in its proper relation 'to the'cam 4in all positions of the lutter, as set: forth.

'llie above specicetion of my said invention signed and witnessed at Philadelphia this 27th dey of July, A. D. 1869.

GYRUS CHAMBERS, Jn.

Witnesses:

WILLIAM MENDHAM, THORWALD GHR. BAMBERG. 

